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Since the start of the coronavirus outbreak some places have fully embraced wearing face masks, and anyone caught without one risks becoming a social pariah.But in many other parts of the world, from the UK and the US to Sydney and Singapore, it's still perfectly acceptable to walk around bare-faced.

the official advice from the World Health Organization has been clear. Only two types of people should wear masks: those who are sick and show symptoms, and those who are caring for people who are suspected to have the coronavirus.

a mask is not seen as reliable protection, given that current research shows the virus is spread by droplets and contact with contaminated surfaces. So it could protect you, but only in certain situations such as when you're in close quarters with others where someone infected might sneeze or cough near your face.

His final minutes in the custody of the police were captured in a devastating video, as he screamed "Mama." Floyd was pleading with the officers -- one of whom held a knee to his neck -- that he couldn't breathe, to the growing alarm of bystanders, one of whom recorded the scene. Floyd's mother is deceased. But in his cry -- "Mama!" -- I heard a twisted combination of hope and horror. Hope because in that moment he hoped the person who gave him life could save his life even in death. She'd undoubtedly done it before when she was alive. And horror because that's never how a black mama wants to hear her sacred title.

It's an unwavering declaration of faith. Whether they are three, 12, 20 or 46, like Floyd, children yell it when they're excited, proud, threatened or in pain.

I've heard that sound of panicked hope and belief that I could, and would, solve all problems and heal all wounds.

a “super-women-friendly” place to work, boasting 25 percent female engineers.

“I only use Lyft,” he said. “Did you read that interview with the C.E.O., Travis, where he talked about how Uber helps him get girls? He’s a misogynist. I could never use his product.”

The essay that shook Silicon Valley was called “Reflecting on One Very, Very Strange Year at Uber,” and Ms. Fowler began by noting that it was “a strange, fascinating, and slightly horrifying story.”

Washing your hands frequently, with plenty of water and soap, is one of the simplest and most effective measures to stop the spread of the coronavirus. Yet due to a lack of water supply and indoor plumbing, three-quarters of households in the developing world won't be able to follow this advice, Tim Wainwright of the nonprofit WaterAid told The Guardian, because they lack some place to wash with soap and water. How will they cope when the pandemic escalates and there is no clean water to help stop contagion?

The pandemic may be raging in Europe and the US, but it is spreading across Asia, Africa and Latin America, from where it may yet return to strike the Northern Hemisphere again. This pandemic is a global threat, and it will not be defeated until our most vulnerable communities are safe. One of the crucial ways of keeping them safe is to ensure they have access to safe water and sanitation; never has the sixth UN Sustainable Development Goal, which aims to ensure just this by 2030, been more vital for saving and protecting lives.

Two years ago, Cape Town in South Africa came perilously close to "Day Zero" -- the day its 3.7 million residents would run out of water. Strict water rationing has been the order of the day ever since. Water scarcity increases the burden on the poorest of the poor -- women who must walk for miles to find water and carry it back to their homes. And, of course, water scarcity makes the challenge of delivering clean water and sanitation much more complex.

Seriously ill Covid-19 patients treated with hydroxychloroquine and chloroquine were more likely to die or develop dangerous heart arrhythmias, according to a large observational study published Friday in the medical journal The Lancet.

Researchers looked at data from more than 96,000 Covid-19 patients from 671 hospitals. All were hospitalized from late December to mid-April and had died or been discharged by April 21. Just below 15,000 were treated with the antimalarial drugs hydroxychloroquine or chloroquine, or one of those drugs combined with an antibiotic.

Those treatments were linked with a higher risk of dying in the hospital, the study found.

For decades, there has been evidence that classroom techniques designed to get students to participate in the learning process produces better educational outcomes at virtually all levels.

Perhaps they actually felt like they learned more from lectures than they did from active learning.”

because while students eventually see the value of active learning, initially it can feel frustrating.

Your brain’s most important job isn’t thinking; it’s running the systems of your body to keep you alive and well. According to recent findings in neuroscience, even when your brain does produce conscious thoughts and feelings, they are more in service to the needs of managing your body than you realize.

Your brain runs your body using something like a budget. A financial budget tracks money as it’s earned and spent. The budget for your body tracks resources like water, salt and glucose as you gain and lose them

Every thought you have, every feeling of happiness or anger or awe you experience, every kindness you extend and every insult you bear or sling is part of your brain’s calculations as it anticipates and budgets your metabolic needs

If you've heard of the term "MSG," you might have also heard of its common -- but inaccurate -- connotations.For years, monosodium glutamate, a food additive known as MSG, has been branded as an unhealthy processed ingredient mainly found in Chinese food, despite a lack of supporting scientific evidence.

Now, activists have launched a campaign called "Redefine CRS." Headed by Japanese food and seasoning company Ajinomoto, the online campaign urges Merriam-Webster to change its entry to reflect the scientific consensus on MSG -- and the impact of misinformation on the American public's perception of Asian cuisine.

First off: what is MSG?Chances are, you've eaten it. It's a common amino acid naturally found in foods like tomatoes and cheese, which people then figured out how to extract and ferment -- a process similar to how we make yogurt and wine. This fermented MSG is now used to flavor lots of different foods like stews or chicken stock. It's so widely used because it taps into our fifth basic taste: umami (pronounced oo-maa-mee). Umami is less well known than the other tastes like saltiness or sweetness, but it's everywhere -- it's the complex, savory taste you find in mushrooms or Parmesan cheese.

Ethicists and physicians are concerned that, amid a desire to put an end to the Covid-19 pandemic, developers of drugs and vaccines have become overly enthusiastic about the chances their products will work.

Oxford has recently walked back some of its optimism, but for months, it set a tone that its vaccine was the most promising, without any solid evidence that this was based in fact.

Third, one leader in the Oxford team has gone so far as to denigrate other teams trying to get a Covid vaccine on the market, calling their technology "weird" and labeling it as merely "noise." Such name-calling is highly unusual and aggressive among scientists.

To further study how regional differences affect behavior, the researchers decided to rearrange some chairs. They went to Starbucks and pushed chairs together in a way that would inconvenience people trying to walk through the cafe, then waited to see how many people would push the chairs out of their way.

Science has been exploring the connection between happiness and longevity for some time. A 2011 analysis of nearly 4,000 Brits found those who said they felt content, happy or excited on a typical day were up to 35% less likely to die prematurely. In a 2016 study, a positive outlook was associated with longer life for nearly 4,000 older French men and women studied over 22 years.

According to research on the Positive Psychology Center website, striving for well-being will allow you to perform better at work, have better relationships, a stronger immune system, fewer sleep problems, lower levels of burnout, better physical health and -- you'll live longer.

"Happiness comes in different sizes and flavors," said cardiologist Dr. Alan Rozanski, a professor of medicine at the Icahn School of Medicine at Mount Sinai who studies optimism."There is the transient type, fed by such things as a walk in a park, spending time with a friend, or eating that ice cream you love," he continued. "But these feelings of happiness come and go."

Don’t get too creeped out, but there are a whole lot of people walking around right now with a map of your face in their brains. But at least it’s a two-way street—you have their faces mapped in yours, too. That’s the conclusion of a recent report published in the journal Cortex. Social animals depend on being able to recognize one another. All monkeys might look the same to you, but you can be sure that they can tell each other apart. The same is true for humans. The ability to identify another person is a vital part of social interaction, which is an essential part of our lives. 

For that reason, our brains seem to devote a lot of real estate to facial recognition. Scientists believe that most of the work of facial perception happens in two brain sections: the occipital face area (OFA) and the fusiform face area (FFA). But it wasn’t clear how those regions managed recognition. 

Scientists used to believe that memory was like a filing cabinet. You have an experience, and it gets its own little file in your brain. Then, later, you can go back and open the file, which is unchanged and where it should be. It’s a nice, tidy image—but it’s wrong. Your brain is much more complicated and sophisticated than that. It’s more like a super-high-powered computer, with dozens of tasks and applications running at once.

A 2011 study found that the Doorway Effect is the result of several of these brain programs running simultaneously. Researchers taught 55 college students to play a computer game in which they moved through a virtual building, collecting and carrying objects from room to room. Every so often as the participants traversed the space, a picture of an object popped up on the screen. If the object shown was the one they were carrying or the one they had just put down, the participants clicked “Yes.” Sometimes these pictures appeared after the participant had walked into a room; other times they appeared while the participant was still in the middle of a room. The researchers then built a real-world version of the environment and ran the experiment again, using a box to hide the objects people were carrying so they couldn’t double-check.

Joe Biden during a CNN town hall Friday night detailed how he'd respond to the coronavirus pandemic.

But he offered an uplifting message -- one in tune with his campaign's core theme -- about the soul of the nation being on display in Americans' reaction to the crisis.

He left room for conditions, suggesting at one point that the freeze might not to apply to those whose income up to $75,000 is replaced by unemployment insurance. But he then said: "There should be a rent freeze. No one should be evicted during this period -- period."

a third of Americans say that they are personally worried about losing their jobs or missing out on career opportunities if they express their real political opinions.

Cancel culture now poses a real threat to intellectual freedom in the United States.

Americans in all walks of life have been publicly shamed, pressured into ritualistic apologies or summarily fired

Plato and Aristotle disagreed about the imagination

Plato gave the impression that imagination is a somewhat airy-fairy luxury good. It deals with illusions and make-believe and distracts us from reality and our capacity to coolly reason about it. Aristotle countered that imagination is one of the foundations of all knowledge.

What is imagination?

Everyone—even the most privileged among us—has circumstances they would like to change in their life.

How might you improve the situation? Your answer might be, “I should move, get a new job, and meet new people.” In other words, you should change the outside world to make it better for you.

Between the conditions around you and your response to them is a space. In this space, you have freedom. You can choose to try remodeling the world, or you can start by changing your reaction to it.

Whether to call Hitler gravely immoral or evil is one of literally hundreds of discussions about this article, which is among the most viewed ever on the site — more than 125 million times over the last 15 years, twice as many as Jesus’s total and in the neighborhood of the number for the soccer player Cristiano Ronaldo.

Setting the record straight matters because historical misinformation walks hand in hand with current disinformation.

Putin has two claims he says are backed by the historical record: that there has never been a separate Ukrainian nation, and that people who claim there is a separate nation must have another motive, whether personal gain or an ideological cause like Nazism.

At a talk on ethical artificial intelligence, the speaker brought up a variation on the famous trolley problem, which outlines a philosophical choice between two undesirable outcomes.

Say a self-driving car is traveling down a narrow alley with an elderly woman walking on one side and a small child on the other, and no way to thread between both without a fatality. Who should the car hit?

To get a sense of what this means, suppose that regulators require that any public health content — for example, on vaccines — not be vastly different for politically left- and right-leaning users. How should auditors check that a social media platform complies with this regulation? Can a platform be made to comply with the regulation without damaging its bottom line? And how does compliance affect the actual content that users do see?

The author of Babel and The Poppy War, Rebecca F Kuang, has said she finds the idea that authors should only write about characters of their own race “deeply frustrating and pretty illogical”.

the author, who was born in China but moved to the US when she was four, said that there is a “really weird kind of identity politics going on in American publishing”. She is “sympathetic” to an extent, as it is coming from “decades of frustration of seeing the same racist, uncritical, under-researched, shallow stereotypes”

The problem is, Kuang thinks, is that this has now “spiralled into this really strict and reductive understanding of race”. As a result, a movement that began as a call for more authentic stories about marginalised communities “gets flipped around and weaponised against the marginalised writers to pigeonhole them into telling only certain kinds of stories”.